Stock-feed mechanism for turret-lathes.



No. 721,862. PATBNTED MAR. 3, 1903.v

' 1 Z. B. GOES.

STOCK FEED MECHANISM FOR TURRET LATHES. I APPLICATION FILED AUG. 19, 1902. no MODEL. a BHBET8SHEET 1.

WITNESSES: INVENTOR ATTORNEY YHE iaunms vzrzns co PHOTO-LIYHCL. WASHINGTON, D. :2.

UNITED. STATES PATENT OFFICE.

ZORESTER. B. OOES, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO DE LAVAL STEAM TURBINE COMPANY,

A CORPORATION OF NEW JERSEY.

SPECIFICATION formingpart of Letters Patent No. 721,862, dated March 3, 1903.

Application filed August 19, 1902.

To a whom it may concern: I

Be it known that I, ZORESTER B. GOES, of Philadelphia, Philadelphia county, Pennsylvania, have invented a new and useful Im-. provement in Stock-Feed Mechanisms for Turret-Lathes, of which the following is a specification.

The invention relates to a device for feeding stock in turret-lathes.

The invention consists in the rotary feedrolls holding the stock between them and adjustable toward and from one another over circular arcs and also in the construction more particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a longitudinal section of my improved stockfeedv mechanism on the line w a: of Fig. 2, the stock 26 being omitted. Fig. 2-is a partial end view with the outside cover-plate removed and in section on the line {1] y of Fig. 1. Fig. 3 is a horizontal section on the line .2 z of Fig. 2.

Similar numbers of reference indicate like parts.

21 is the lathe-spindle, and 22 the headstock.

The mechanism of my device is disposed within the cylindrical chuck-body 1, which is screwed upon the spindle 21. Within said body, but rigidly attached to said head-stock by means of a key (not shown) entering the keyway 23, is a gear 2. Said gear engages with a planet-pinion 3, which is mounted loosely on the shaft 4, journaled in the chuckbody. Pinion 3 slides freely on shaft 4 and is controlled in its sliding movement by a fork 5, attached to a sleeve 6 on the exterior of said body. Said sleeve is moved longitudinally the chuck-body through any convenient means by the hand of the operator. On one end of pinion 3 are clutch-teeth 24, which when the pinion is moved to the left of Fig. 1 engage with similar clutch-teeth 25 on the end of a worm 7, which is also mounted on shaft 4. Hence while the pinion 3 revolves continually with the lathe-spindle 21 the worm 7 is rotated only when the pinion 3 is moved to bring the clutch-teeth 24 25 into engagement. atestwo worm-gears 8 and 8*, carried by pin- The worm 7 engages with and operions 9 9*, which pinions are loosely mounted Serial No. 120,185. (No model.)

on studs 10 and 10*. These studs,-together with similar studs 11 and 11*, are mounted in the chuck-body and 'form trunnions for a pair of swinging blocks 12 and 12*. In these blocks are mounted the stock-feeding rolls 13 13*, which are rigidly attached to the driving-shafts 14 14*. Each shaft 14 14* has at its end a pinion 15, Fig. 1, which always engages with the pinions 9 9*.

From the foregoing it will be apparent that whenever the worm 7 is rotated the feed-rolls 13 13* will be positively driven through the pinions 9 9* 15 and shafts 1414*, while at the same time the swinging blocks 12 12* can always be revolved on their trunnions, so as to swing the feeding-rolls in arc, and so move said rolls toward or from each other to suit any diameter of stock 26 for which the lathe may be adapted. This movement of the feedrolls is controlled, so that either one or both may be adjusted, by means of adj ustingscrews 16, mounted in the chuck-body and provided with squared heads for convenience in operation. Each screw engages with a swivel-nut 17, mounted in a slot cut in the swing-block, as 12, which receives it. A pair of strong helical springs 18 is attached to the swinging blocks and operate to draw said blocks together and so cause the feed-rolls to bear hard upon the stock. The arrangement of the adjusting-screws 16 is such that any projecting irregularities of the stock being fed cause the rolls to be forced apart until they have passed; but after passage the adjusting-screws 16 will prevent the springs 18 pulling the rolls together beyond the limit for g which said screws may be adjusted.

By means of the construction of the swinging blocks'and the relative positions of trunnions, rolls, and springs said springs have powerful control over the feed-rolls, and their action is strongest as the stock-bars fed be tween the rolls are of larger diameter..

An end plate 19 is mounted on the rear end of the. chuck-body,'to which it is rigidly attached, and carries the usual adjustingscrews 20 for centering the stock in alinement with rolls and spindle.

I claim- 1. The combination with the head-stock carryin g a fixed pinion and the rotary lathe-spindle, of a chuck-body carried by said spindle, afeed-rolldrive-shaft journaled in the chuckbody parallel with its axis, a planet-pinion on said shaft and meshing with said fixed pinion, two U-shaped blocks or arms pivoted at their ends at diametrically opposite points to the chuck-body to swing toward and from the axis thereof, feed-roll shafts journaled in the swinging arms beyond the axis thereof and provided between their ends with feed-rolls, pinions on corresponding ends of the feedroll shafts, loose pinions on corresponding axes of the swinging arms, meshing with the feed-roll pinions and provided with connected or integral worm-gears, a worm on the feedroll drive-shaft meshing with said two wormgears, means for clutching said worm to the planet-gear for rotation thereby, and means for adjusting the free ends of the swinging arms toward and from each other, substantially as described.

2. The combination with the stationary head-stock provided with an annular fixed pinion, of the tubular lathe-spindle extending through said annular gear and provided with a fixed chuck-body to rotate with it, a single longitudinally-extending shaft mounted in the chuck-body parallel with the axis thereof and provided with a sliding planetpinion meshing with said fixed annular gear, a worm mounted on said longitudinal shaft, clutch-faces on the adjacent sides of said worm and planet-gear, means for sliding the planet-gear, swinging arms mounted in said chuck-body, and feed-roll shafts mounted in said swinging arms and geared at corresponding ends to said wormgear and means for adjusting the swinging arms and pressing them toward each other, substantially as described.

3. In a stock-feed mechanism, the combination of the chuck-body 1, pivoted swinging roll-supports 12,12* therein, feed-rolls 13, 13* journ aled in said supports, swivel-nuts 17 in said supports and adjusting screws 16 received in said nuts, substantially as described.

4. In combination with the chuck-body 1, the pivoted swinging arms 12, 12* journaled in said body, the roll-shafts 14, 14* journaled in said arms, pinions 15 and feed-rolls 13, 13* carried by said shafts, pinions 9, 9* journaled in said body and gearing with said pinions 15, worm-pinions 8, 8* respectively connected to said pinions 9, 9*, worms 7 engaging with said pinions 8, 8* and means for rotating said worm 7, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ZORESTER B. GOES.

Witnesses:

MASON C. OXENFORD, LoUIs OLSON BARTON. 

